JP2013068218A - Lubrication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an improved embodiment used for a lubrication system, which is simple in terms of structure, and in which volume flow rate adjustment is performed at a favorable cost.SOLUTION: The lubrication system comprises: a pump 2 for pressure-feeding a flow of lubricating oil; a lubricating oil tank 3; a component 4 to be oil-lubricated which is, in particular, an internal combustion engine or a gear device; a diaphragm 5 placed between the pump and the component to be oil-lubricated and at the downstream side of the pump in order to limit a flow amount of the lubricating oil; and an adjusting valve 6 which is opened and closed according to lubricating oil pressure which is spread to the upstream side of the diaphragm, and thereby adjusts the lubricating oil pressure spread in front of the diaphragm.

Description

  The present invention relates to a lubrication system including a pump for pumping a flow of lubricating oil. The invention also relates to an internal combustion engine or gear arrangement comprising such a lubrication system.

  Lubrication systems are used today in all automobiles and serve to supply lubricating oil to components to be lubricated, for example internal combustion engines or gearing. Here, in order to be able to obtain the optimum lubricating effect, continuous lubrication is very important on the one hand, and on the other hand, lubrication on demand is very important. If, for example, a flow of lubricating oil is sent to the lubrication system at a pressure that is too high, the lubricating effect is sacrificed. For this reason, controllable lubricating oil pumps are often used, for example vane pumps or pendulum slider pumps. However, control of the controllable lubricant pump is often performed by a separate pressure sensor and control device, and thus in a relatively cumbersome and expensive manner.

  Patent Document 1 discloses a volume flow rate adjusting type one-step vane pump. In such a vane pump, an increase in pressure is generated in the adjusting chambers on both sides of the cam ring due to the cross section of the throttle gap between the cam ring and the side wall of the housing. This achieves a structurally simple pump structure with quick regulation and non-critical vibration.

German published application DE102005050216A1

  The present invention is directed to the problem of providing an improved embodiment for a lubrication system in which volumetric flow control is performed at a structurally simple and favorable price.

  According to the invention, this problem is solved by the subject matter of the independent claims. Advantageous embodiments are the subject matter of the dependent claims.

  The present invention comprises a pump for pumping a flow of lubricating oil, a lubricating oil tank, and at least one lubricating component, allowing the diaphragm to pass only limited volumetric flow (ie, lubricating oil flow). When the volume flow rate pumped by the pump rises beyond this, the regulating valve is driven according to the lubricant pressure spreading upstream of the diaphragm, so that It is based on the concept of providing a lubrication system in which the spreading lubricant pressure is automatically adjusted. Here, the component to be lubricated can in particular be an internal combustion engine or a gear arrangement, in which the lubrication system can usually be designated as a fluid system. For example, also in the field of steering devices with servo aids, the lubricating system can be designated as a fluid system, in which case the lubricating oil is replaced by hydraulic oil. A diaphragm is provided between the pump and the component to be lubricated and at the same time downstream of the pump, and the amount of lubricating oil flow so as to pass only a precisely predetermined amount, for example 30 l / min. It works to limit. Pumping more lubricant flow will result in an increase in lubricant pressure upstream of the diaphragm and hence at least partial opening of the regulator valve, thereby spreading upstream of the diaphragm. Lubricating oil pressure can be reduced and specifically adjusted. Compared to the conventional electronic adjustment process of the pumping amount of the pump, the present invention constitutes a volumetric flow adjustment which is structurally simple on the one hand and set to a favorable price on the other hand.

  In an advantageous further development of the solution according to the invention, the regulating valve is connected on the input side to the output side of the pump and on the output side to the input side of the pump. Therefore, in the closed state of the regulating valve, the lubricating oil pressure spreading upstream of the diaphragm is applied to the input side of the regulating valve and then to the valve slider which is applied with force by the spring. Thanks to the spreading lubricant pressure, the pump output side is connected to the pump input side only when this valve slider is moved to its open position, thereby spreading on the pump output side and hence upstream of the diaphragm A bypass occurs that reduces or individually regulates the lubricant pressure. Such a regulating valve can be constructed structurally simply and therefore at a very favorable cost.

  In another embodiment of the solution according to the invention, the regulating valve, in the case of a closed regulating valve, is connected on the first input side to the pump output side and on the second input side to the pump regulating chamber. In addition, it is connected to the lubricating oil tank on the output side, so that the adjustment chamber can be emptied. In the case of a closed regulating valve, the regulating slider moves the valve slider so that the regulating chamber is directly connected to the lubricating oil tank and thereby the regulating chamber can be emptied or the regulating chambers are each at normal pressure. If the flow of lubricating oil pumped by the pump exceeds the flow of lubricating oil that can penetrate the diaphragm, the lubricating oil pressure increases in front of the diaphragm and as soon as the valve slider moves to its open position, A regulating valve is connected on the output side to the regulating chamber of the pump. This results in a reduction in pumping volume depending on the lubricating oil pressure.

  By reducing the pumping amount of the pump, the lubricant pressure spreading on the output side of the pump and hence upstream of the diaphragm is lowered, thereby causing the valve slider to be retracted again in its closed position and adjusted accordingly The pressure in the chamber decreases, thereby increasing the pump pumping again. Therefore, the system is stable. Therefore, in this embodiment, the pumping amount of the pump is adjusted according to the lubricating oil pressure spreading upstream of the diaphragm.

  In a further advantageous embodiment of the solution according to the invention, the diaphragm is adjustable with respect to the amount passed, i.e. with respect to the volume flow rate through which it can penetrate. This gives the particular advantage that the overall lubrication system can be readjusted and the amount of lubricating oil supplied to the component to be lubricated can also be adjusted. Of course, instead of this, it is also conceivable to use a fixed diaphragm in which the passing amount of the lubricating oil is predetermined, for example, 30 l / min.

  Further important features and advantages of the invention emerge from the dependent claims, from the drawings and from the associated description of the drawings using the drawings.

  It will be appreciated that the features described above and described in further detail below can be used not only in the individually illustrated combinations, but also in other combinations or alone, without departing from the spirit of the invention.

  Preferred exemplary embodiments of the invention are shown in the drawings and are explained in more detail in the following description, in which identical reference numerals indicate identical or similar or functionally identical configurations. Refers to an element.

1 shows a first possible embodiment of a lubrication system according to the invention. FIG. 2 is a view similar to FIG. 1 except that the supply amount of the pump exceeds the maximum passage amount of the diaphragm. FIG. 6 shows a further alternative of the lubrication system according to the invention. Similarly, it is a figure similar to FIG. 3 except that the supply amount of the pump exceeds the maximum passage amount of the diaphragm.

  As shown in FIGS. 1 to 4, a lubrication system 1 according to the present invention includes at least one pump 2 for lubricating the flow of lubricating oil, a lubricating oil tank 3, and particularly an internal combustion engine or a gear device. A component 4 to be lubricated is provided. In the following, reference will always be made to the lubrication system 1. Of course, the lubrication system 1 can be configured as a fluid system, and other fluids can be accommodated accordingly. Here, a diaphragm 5 is provided between the pump 2 and the component 4 to be lubricated and simultaneously downstream of the pump 2 in order to limit the amount of lubricating oil flow. A regulating valve 6 is also provided that opens and closes in response to the lubricating oil pressure spreading upstream of the diaphragm 5. In the regulating valve 6, a preferred intermediate open position is of course also conceivable, whereby the lubricating oil pressure spreading in front of the diaphragm 5 is reduced or individually adjusted. The regulating valve 6 can be provided with a valve slider 8 to which a compressive force is applied in the closing direction by a spring 7 and a force is applied by a spring. The diaphragm 5 sets a volume flow rate necessary for the lubrication of the component 4 and can be set to, for example, 30 l / min. In this case, the pressure in the lubrication system 1 is at least approximately equal upstream and downstream of the diaphragm 5 up to a volume flow of 30 l / min. According to FIG. 1, the volumetric flow rate pumped by the pump 2 is less than or at most comparable to the volumetric flow rate that can penetrate the diaphragm 5 to the maximum extent, so that the regulating valve 6 is in its closed position. On the other hand, according to FIG. 2, the volume flow rate pumped by the pump 2 is larger than the volume flow rate that can pass through the diaphragm 5, whereby the valve slider 8 moves against the elastic force of the spring 7. And thereby connecting the output side to the input side of the pump 2, whereby the pressure upstream of the diaphragm 5 is reduced and particularly adjusted. The movement of the valve slider 8 is here carried out by the lubricating oil pressure spreading upstream of the diaphragm 5.

  Here, one of the valve sliders 8 is connected to the output side of the pump 2, and the other is connected to the lubrication system 1 downstream of the diaphragm 5. Therefore, if the pressure upstream of the diaphragm 5 is less than the pressure spreading downstream of the diaphragm 5 or at most as high as possible, the valve slider 8 remains in its closed position. As the lubricating oil pressure upstream of the diaphragm 5 rises above the lubricating oil pressure spreading downstream of the diaphragm 5, a slow movement of the valve slider 8 occurs, whereby the valve slider 8 is illustrated in FIG. Move to its open position. With respect to the volume flow rate that can permeate, the diaphragm 5 can usually be made unchanged. Of course, it is also conceivable that the diaphragm 5 can be adjusted with respect to the amount that can be passed.

  According to the lubrication system 1 according to the present invention shown in FIGS. 1 and 2, it is not necessary to directly adjust the pumping amount of the pump 2 at that time, and relatively simple adjustment of the flow of the lubricating oil to be pumped is performed. Can be achieved. Therefore, in the embodiment shown, the pump 2 can be continuously operated with the same performance. Of course, a filter 9 can be provided between the pump 2 and the lubricating oil tank 3.

  Another embodiment of the lubrication system 1 according to the present invention is shown in FIGS. 3 and 4, where no bypass is created by the regulating valve 6, rather the pump 2 pumping capacity is upstream of the diaphragm 5. Adjusted according to spreading lubricant pressure. Here, in FIG. 3, the lubricating oil pressure spreading upstream of the diaphragm 5 is smaller than or equal to the lubricating oil pressure spreading downstream of the diaphragm 5. 6 is closed, thereby connecting between the regulating chamber 10 of the pump 2 and in particular the normal pressure oil tank 3. As the amount of lubricating oil pumped by the pump 2 increases and thereby the volume flow rate pumped by the pump 2 increases beyond the volume flow rate that can penetrate the diaphragm 5, it spreads upstream of the diaphragm 5. As the lubricating oil pressure increases, it causes movement of the valve slider 8 to the position shown in FIG. In this position, the pressure regulating chamber 10 is no longer connected to the lubricating oil tank 3, but in this case the pressure regulating chamber 10 is connected to the pump output side and the lubricating oil pressure is intense on the pump output side, ie upstream of the diaphragm 5. If it increases, the pressure in the regulating chamber 10 also increases, whereby the pumping volume of the pump 2 is reduced and specifically adjusted. Therefore, according to FIG. 4, the regulating valve 6 is depicted in the open position and is connected to the output side of the pump 2 and connected to the regulating chamber 10 of the pump 2 on the output side, whereby the pump 2 is adjusted. On the other hand, according to FIG. 3, the regulating valve 6 is depicted in the closed position and thereby connected on the input side to the output side of the pump 2. At the same time, the other input side of the regulating valve 6 is connected to the regulating chamber 10 of the pump 2, and the output side is connected to the lubricating oil tank 3, so that in the case depicted in FIG. Can be.

  The pump 2 can be configured, for example, as a vane pump or as a pendulum slider pump, in which case the adjusting chamber 10 adjusts the eccentricity of the rotor and hence the pumping amount.

  Therefore, according to the lubrication system 1 shown in FIGS. 1 to 4, independent and relatively easy volume flow rate adjustment by the diaphragm 5 is possible, and in contrast to the lubrication system 1 shown in FIGS. 3 and 4. In addition, in the lubrication system 1 shown in FIGS. 1 and 2, the pumping amount of the pump 2 remains unaffected.

Claims (9)

A pump (2) for pumping the flow of lubricating oil;
Lubricating oil tank (3),
A component (4) to be lubricated, in particular an internal combustion engine or gearing; and
A diaphragm (5) placed between the pump (2) and the component to be lubricated (4) and downstream of the pump (2) to limit the amount of lubricating oil flow;
A regulating valve (6) that opens and closes according to the lubricating oil pressure spreading upstream of the diaphragm (5), thereby adjusting the lubricating oil pressure spreading before the diaphragm (5);
A lubrication system (1). The lubrication system of claim 1.
The lubrication system, wherein the regulating valve (6) is connected to the output side of the pump (2) on the input side and connected to the input side of the pump (2) on the output side. The lubrication system of claim 1.
In the case of the closed regulating valve (6), the regulating valve (6) is connected to the output side of the pump (2) on the first input side, and the regulating chamber of the pump (2) on the second input side. (10), and connected to the lubricating oil tank (3) on the output side, whereby the adjustment chamber (10) can be emptied and / or the adjustment valve (6) In the case of the regulating valve (6) which is at least partially open, it is connected to the output side of the pump (2) on the input side and to the regulation chamber (10) of the pump (2) on the output side. The lubricating system is characterized in that the pumping amount of the pump (2) is adjusted thereby. The lubrication system according to any one of claims 1 to 3,
The lubrication system, wherein the pump (2) is configured as a vane pump or a pendulum slider pump. In the lubrication system according to any one of claims 1 to 4,
Lubricating system characterized in that the diaphragm (5) allows a certain amount of lubricating oil to pass, especially at 30 l / min. In the lubrication system according to any one of claims 1 to 5,
Lubricating system characterized in that the diaphragm (5) is adjustable with respect to the amount of passage. The lubrication system according to claim 6.
The lubrication system, wherein the regulating valve (6) has a valve slider (8) to which a force is applied by a spring, and thereby a compressive force is applied in a closing direction thereof. The lubrication system according to claim 7, wherein
The valve slider (8) is incorporated in the lubrication system (1) on the one hand upstream of the diaphragm (5) and on the other hand downstream of the diaphragm (5). .   Internal combustion engine or gear arrangement comprising a lubrication system (1) according to any one of the preceding claims.

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